Abstract

We introduce a novel imaging technique called light field moment imaging (LMI) that uses the continuity equation to extract the first angular moments of a light field. We use these moments to construct perspective views of a scene. Examples of LMI in photography and microscopy are presented.

Figures (2)

(a) Schematic of the light field parameterization used. θX and θY are defined by the projections of a ray onto the xz and yz planes, respectively. (b) A photograph of a bent sheet of paper. A video showing two images at different focal planes, followed by an animation of the viewpoint traveling horizontally is shown as Media 1. (c) Normalized depth map of the sheet with gray-scale bar indicating depth. Normalized depth ranges from 0 (closest to camera) to 1 (farthest from camera).

(a) Micrograph of a folded tissue slice. Scale bar is 200 μm. The two input images and a perspective-shifting animation of the tissue slice are shown as Media 2. (b) Micrograph of the head of a wood tick. Scale bar is 200 μm. The two input images and a perspective-shifting animation of the wood tick head are shown as Media 3. (c) Gray-scale plot of the magnitude of the moment vector field M for the tissue sample in (a). The gray-scale bar shows the dimensionless value of |M|. (d) Micrograph of a pile of 5 μm fluorescent beads. Scale bar is 25 μm. The two input images and a perspective-shifting animation of this sample are shown as Media 4.